scholarly journals Optimization of Texture Density Distribution of Carbide Alloy Micro-Textured Ball-End Milling Cutter Based on Stress Field

2020 ◽  
Vol 10 (3) ◽  
pp. 818
Author(s):  
Minli Zheng ◽  
Chunsheng He ◽  
Shucai Yang
Keyword(s):  
Wear Resistance ◽  
Stress Field ◽  
Density Distribution ◽  
Titanium Alloys ◽  
Contact Area ◽  
End Milling ◽  
Variable Density ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Texture Density

The insertion of micro-textures plays a role in reducing friction and increasing wear resistance of the cutters, which also has a certain impact on the stress field of the cutter during milling. Therefore, in order to study the mechanisms of friction reduction and wear resistance of micro-textured cutters in high speed cutting of titanium alloys, the dynamic characteristics of the instantaneous stress field during the machining of titanium alloys with micro-textured cutters were studied by changing the distribution density of the micro-textures on the cutter. First, the micro-texture insertion area of the ball-end milling cutter was theoretically analyzed. Then, variable density micro-textured ball-end milling cutters and non-texture cutters were used to cut titanium alloy, and the mathematical model of milling force and cutter-chip contact area was established. Then, the stress density functions of different micro-texture density cutters and non-texture cutters were established to simulate the stress fields of variable density micro-textured ball-end milling cutters and non-texture cutters. Finally, the genetic algorithm was used to optimize the variable density distribution of micro-textured cutters in which the instantaneous stress field of the cutters was taken as the optimization objective. The optimal solution for the variable density distribution of the micro-textured cutter in the cutter-chip tight contact area was obtained as follows: the texture distribution densities in the first, second, and third areas are second, and third areas are 0.0905, 0.0712, and 0.0493, respectively.

Investigation on the stress field of milling titanium alloys with micro-textured ball-end milling cutter

2019 ◽  
Vol 233 (11) ◽  
pp. 2160-2172 ◽  
Author(s):  
Shucai Yang ◽  
Chunsheng He ◽  
Minli Zheng
Keyword(s):  
Titanium Alloy ◽  
Stress Field ◽  
Density Function ◽  
End Milling ◽  
Equivalent Stress ◽  
Force Density ◽  
Stress And Strain ◽  
Milling Force ◽  
Milling Cutter ◽  
Ball End Milling

In the milling of titanium alloy, the distribution of milling force and its related law of change seriously affect the physical properties of workpiece materials, the stress distribution on a cutter’s rake face and the interaction between the workpiece, the cutter and the chip. This article reports on a study of the stress field distribution under the conditions of anti-friction and anti-wear when cutting titanium alloy with a micro-textured ball-end milling cutter. Milling test data were used to establish empirical models of milling force and the contact area between the cutter and the chip. Based on this, the force density function of the cutter coordinate system was obtained and the equivalent stress and displacement of the cutter were simulated and analyzed. This in turn provided the means to acquire the instantaneous stress and strain relating to the cutter at any time. Analysis of the simulation results shows that the position in which the stress and strain are concentrated on the cutter is consistent with actual processing. This confirms the accuracy of the force density function and provides the basis for further study of thermo-mechanical coupling behaviors when engaged in using micro-textured ball-end milling cutters for the cutting of titanium.

Modeling and Simulation of Ball End Milling Force for Mold Cavity Corner

2014 ◽  
Vol 800-801 ◽  
pp. 337-341 ◽  
Author(s):  
Yun Peng Ding ◽  
Xian Li Liu ◽  
Hui Nan Shi ◽  
Jiao Li ◽  
Rui Zhang
Keyword(s):  
Contact Area ◽  
End Milling ◽  
Mold Cavity ◽  
Force Model ◽  
Cutting Force Model ◽  
Milling Force ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Milling Force Model ◽  
Corner Machining

In this paper, a cutting force model in ball end milling of mold cavity corner is established. Based on infinitesimal milling force model, cutting element of ball end milling cutter is treated as equal diameter end milling cutter, then determine the location of points when the micro-element participated in the cutting, and the tool-workpiece contact area and cutting range is determined. Thereby a complete milling force model in corner machining with ball end milling cutter is established.

Research on Modeling of Ball-End Cutter for Virtual NC Machining

2010 ◽  
Vol 37-38 ◽  
pp. 1050-1055
Author(s):  
Jiang Hua Ge ◽  
Ping Zhang ◽  
Xiu Lin Sui ◽  
Ping Zhao
Keyword(s):  
Physical Simulation ◽  
End Milling ◽  
Nc Machining ◽  
Surface Model ◽  
Functional Surface ◽  
Geometric Information ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Machining System ◽  
Geometric Simulation

In this paper, a new mathematical model and modeling method of ball-end milling cutter which satisfies the request of physical simulation in virtual NC machining system are proposed. The accurate expressions of the cutting edge are presented. The precise functional surface model of ball-end cutter is developed. And the 3-D visualization for ball-end milling cutter in virtual NC machining is implemented. The model can provide necessary and accurate geometric information for physical simulation and has been applied in milling force simulation. It laid the foundation for integration of geometric simulation and physical simulation.

Parametric Design of Ball-End Milling Tools for High Speed Milling

2014 ◽  
Vol 800-801 ◽  
pp. 484-488
Author(s):  
Cai Xu Yue ◽  
Fu Gang Yan ◽  
Lu Bin Li ◽  
Hai Yan You ◽  
Qing Jie Yu
Keyword(s):  
High Speed ◽  
Parametric Design ◽  
End Milling ◽  
Complex Surface ◽  
Cutting Parameters ◽  
Secondary Development ◽  
Design System ◽  
Work Piece ◽  
Milling Cutter ◽  
Ball End Milling

Ball-end milling cutter is widely used in machining complex surface parts , and it is need to select a reasonable geometric parameters of the milling cutter for different work piece materials and shapes and cutting parameters. This article is based on UG secondary development technology to develop the Multi-blade ball-end milling cutter parametric design system, it is automatic, fast and efficient to build all kinds of parameters of double, three and four blades ball-end milling cutter model required for user.

Grinding Process of Ball End Milling Cutter Flank

2018 ◽  
Vol 764 ◽  
pp. 383-390 ◽  
Author(s):  
Quan Qi Xin ◽  
Tai Yong Wang ◽  
Zhi Qiang Yu ◽  
Hong Yan Hu
Keyword(s):  
Mathematical Model ◽  
End Milling ◽  
Cutting Edge ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Position And Orientation ◽  
The Mathematical Model

In this paper, the mathematical model of "S" - shaped cutting-edge curve is optimized, and the position and orientation of the grinding wheel of the first and second flank of the ball end milling cutter are calculated, The correctness of the algorithm is verified by VERICUT simulation.

Micro Ball End Milling of Nickel-Based Alloy for Laval Nozzle

2014 ◽  
Vol 800-801 ◽  
pp. 852-857 ◽  
Author(s):  
Yu Kui Cai ◽  
Zhan Qiang Liu
Keyword(s):  
Laval Nozzle ◽  
End Milling ◽  
Circular Cross Section ◽  
Surface Topology ◽  
Machining Accuracy ◽  
Large Radius ◽  
Machined Surface ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Micro Nozzle

The performance of the micro nozzle is determined primarily by its machined surface topology and geometric profile. A circular cross-section micro-Laval nozzle is modeled and studied by using numerical simulation in this paper. The real residual height and residual area of machined nozzle surface with ball-end milling cutter are proposed. A micro-Laval nozzle was machined successfully. It is found that the ball end milling cutter with large radius is suitable for finishing operations in the viewpoint of nozzle performance. Moreover, the serial process of drilling and milling has been proved by experiments with which both high-level machining accuracy and performance can meet the nozzle requirement.

Support vector regression and genetic-algorithm-based multiobjective optimization of mesoscopic geometric characteristic parameters of ball-end milling tool

2020 ◽  
Vol 234 (10) ◽  
pp. 1333-1345 ◽  
Author(s):  
Xin Tong ◽  
Xianli Liu ◽  
Song Yu
Keyword(s):  
Genetic Algorithm ◽  
Titanium Alloys ◽  
Support Vector Regression ◽  
End Milling ◽  
Geometric Characteristic ◽  
Support Vector ◽  
Characteristic Parameters ◽  
Ball End Milling ◽  
Milling Tool

The poor machinability of titanium alloys results in the serious wear of the rake face of a ball-end milling tool. Previous studies indicated that the mesoscopic geometric characteristics of the tool can effectively improve the wear resistance. Therefore, in this thesis, a milling force model and a milling temperature model of a ball-end milling tool were established to verify the effect of the blunt and negative chamfer tool edges. Setting up a test platform for milling titanium alloy, the influence of mesoscopic geometric characteristic parameters on cutting performance of the ball-end milling tool was analyzed. In addition, based on the support vector regression and genetic algorithm, the optimal mesoscopic geometric characteristic parameters were obtained, which were under the four evaluation indices, such as mechanical–thermal characteristics, tool wear, and surface quality of the workpiece. It was verified experimentally that the tool life of the optimized micro-textured tools with the blunt and chamfer tool edges were improved by 33% and 25%, respectively, and the surface roughness was reduced by 26% and 23%, respectively, which were compared to the non-optimized tools. This thesis provides a reference for improving the processing efficiency and the quality of titanium alloys.

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